Fangrui Product Details Fangrui Product Details Fangrui Product Details Comprehensive Battery Testing Solution: Designed For Precision Testing Of 18650 Lithium Batteries, It Can Accurately Measure Battery Capacity And Internal Resistance. The Tester Uses Dc 12v Input And Is Suitable For Various Testing Environments Advanced Safety Features: The Device Is Equipped With Multiple Protection Functions To Ensure Safe And Reliable Operation, Protecting The Tester And Battery From Potential Damage Automatic Saving: With An Advanced Function Setting Menu, You Can Expand And Form Functions In Many Aspects, All Parameters Are Automatically Saved, And It Is Designed With A Power-off Automatic Memory Function, So You Dont Have To Worry About Power Failures In The Middle Integrated Advanced Calculation Function: You Can Directly Get The Battery Energy (wh) And Battery Discharge Platform Voltage Without The Help Of A Computer Efficient And Reliable: It Is An Ideal Choice For Professionals And Amateurs. It Provides A Reliable Tool For Comprehensive Battery Management And Can Improve The S